Method and apparatus for mixing
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United States of America Patent
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app pub date -
Nov 15, 2002
filing date -
Mar 18, 1998
priority date (Note) -
Abandoned
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Abstract
A method for mixing flowable polymer material with particulate additive utilizes a continuous process. A pre-blend of the polymeric material and additive is made in a hopper. The pre-blend is compacted and fed into a first mixing arrangement to form an intermediate blend. The first mixing arrangement has a rotor with a helical flight located within a chamber. The intermediate blend is fed into a second mixing arrangement to form a final blend. The second mixing arrangement has a conical rotor with blades. The rotors of the first and second mixing arrangements are coaxial but operate at different speeds.
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